Lubricating pump for engines



Sept. l", 19-23. 1,467,619 H, HULL LUBRICATING PUMP FOR ENGIS Filed March 13 1919 2 Sheets-Sheet 1 Warm.-

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Patented Sept. ll, 1923.

,natie rtcj- HOMER HULL, OF DETROIT, MICHGAN, .ASSIGNOR TO AMERICAN BLOWER COMPANY,

OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

LUBRICATING PUMP Fon' ENGINES.l

Application filed March 13, 1919. Serial No. 282,446'.I

To al? whom t may con-cern.

Be it known that I. Homin HULL, citizen of the United States, residing at Detroit, in the county of lVayne and State of Michigan, have invented certain new and useful lmprovements in Lubricating Pumps for Engines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates tfo pumps, andY while susceptible of different uses, it is more particularly7 designed for automatic lubrication of engines.

Considerable diiculty has heretofore been experienced through defective lubrication of engines, more particularly the small, high speed, vertical type of engines, and it is one of the primary objects ofthe present invention to generally improve upon lubricating pumps, as at present constructed, for the purpose of adequately and properly lubrif eating the parts of engines of this particular type.

Many of `the lubricating pumps at present largely in use have proven highly satisfactory except when th@J engine was operating at low speeds, say below fifty revolutions per minute, and when the vengine has slowed down, to say as low as ten or twelve revolutions per minute` as is often the case with engines used by automatic stoker manufacturers for engines, for driving blowers for forced draft. it has been ascertainedthat very little, if any, oil would be pumped, at this time` and it is to overcome this objectionable characteristic and to increase the efliciency and usefulness of the pumps of the character under consideration, that the present invention was developed.

Therefore, it may be said to be the pur-- pose and object of the invention to provide a lubricating pump, simple in design and construction, inexpensive to produce. strong and durable. and highly Iellicient and satisfactory in use for the thorough and continuous lubrication of the engine parts, whether the engine is operating at a. high speed, or at a speed even as low as say ten or less revolutions per minute.

lt is a` further object of the invention to provide a lubricating pump unit complete, having` the above characteristics whereby the pump may be readily installed, or removed at will, the design and construction being such as to permit ready assembly on engines of different types. In carrying out the invention, it is proposed to provide an oscillating` oil displacemen't'means operatively associated `with the engine and adapted to, in its back and forth movement, continuously feed the oil through a suitable conduit or conduits to the various working` parts of the engine to be lubricated. Further improvements, and many novel detailsl in the construction and arrangement of parts will be appreciated by those skilled "in .the art from the description to follow, which, for a clear understanding of the Vinvention is to be considered in connection with the accompanying drawings forming a part hereof, and wherein is disclosed, for the 'purpose of illustration, a convenient and satisfactory embodiment of the invention.

'ln the drawings,- l

Figure l is a front elevation of the pump, parts being` broken away;

Figure 2 is a vertical section of the casing and associated parts;

Figures 3 and 4l are sectional views, substantially on the lines 3 3 yand 4 4, res'gpiectively of F igure 2;

Figure is a detail enlarged of the connection between the engine shaft drive member and actuating means for the pump.

lilith more particular reference to the drawings, wherein like reference numerals refer to corresponding` parts throughout the several viewsg l is an engine shaft or the like, having` mounted thereon for rotatable movement therewith, a disc 2, with a peripheral worm cam groove 3. 4 is a vertically dispump lposed pump shaft having secured to the upper end thereof` for relative rotatable ad'- justment as b v means of a. securing pin 5, an oscillator 6having a pin or lug tapered to correspond with the tapered wall surrounding the cam groove 3 whereby to enwith the latter while at the same time adapted for -tree`movement ralong` the groove. A cylindrical pump body 8 is provided. the same conveniently having an integral bottom wall t). and a removable cap or cover 10, the latter being secured in place as by cap screws it, whereby to permit of access into the interior oil receiving chamber l2 and parts therein asfoccasion demands. The cap orl cover part l() conveniently has projecting upwardly" therefrom a y tubular' extension,

cured at any convenient point to a viixed'part of the engine body whereby to support and maintain the pump inposition. Itis obvious of course that the supporting connection between the bracket 141 and the wall to which the same is attached, is such as to permit ot' assembly and removal ot the pump as desired, and in this connection the bracket of course may take various designs and conigurations whereby to adapt itself to the particular part of the engine or particular type of engine in connection with which it is desired to employ the pump.

The oil impeller or displacement member proper, conveniently takes the form of a round disc 15, secured tothe pump shaft 4 for rotatable movement therewith, vthe said disc having a close fit with the interior peripheral wall of the body part1 but adapted to oscillate in the chamber formed by the latter. Likewise the `thickness of the impeller disc 15 is such as to substantially till the space between the top and bottom walls of the body part 8. The impeller disc is provided with a segmental cutout part 16 o't about one-quarter of' the area thereof, though in this connection the degrec of cutout may be varied to suit conditions. Positioned within the cutout part 1s a suitable segment block 17 ot a size considerably less than that o't' the space 16 'formed by the cutout part of the impcller vdisc whereby to permit of relative oscillating movement between fthe disc 15 and the block 17. This block 17 projects 'troni a snuglit with the pump sha'lt Il, to a snug tit with the interior peripheral wall of the body part 8, and from top'to bottoni o1 said body part 8, whereby to prevent the passage of oil from one side of the partition formed by said block to the opposite side thereof. The partition block 17 is removably secured in place so Lasto. when positioned, remain rigid with respect to the body part S as by means of a tap bolt or the like 13.

Arranged in the bottom ot the body part- S are a plurality of oil inlet ports 19 and 2() respectively, there being one at each side of the partition block 17, and the latter conveniently having cutout parts 21 and 2.a respectively. arranged adjacent to said ports. These oil inlet ports 19 and 20 are valve controlled, conveniently by ball valves 23 and 211, loosely positioned within `an enlarged chamber 23a and 24a oi the ports 1f) and 2() respectively. The said valves when seated `are adapted to entirely close the said ports 19 and 20, and when removed from the restricted portion of said' ports the oil has a free passage from the oil supply the oil chamber formed by the cutout parts 16 of the disc 15 and surrounding wall ot' the body part 1 whereby to constitute eX- haust ports oroutlets from said chamber.

Vthe said ports being in communication with rThe exhaust ports just described, vare conveniently formed in removable plugs 25a and 26a, respectively, threaded to suitable threaded aperatures formed in the cover port or cap 10.

The ports 25 and 26 are provided with enlarged parts 27 and 28 respectively for the reception of ball valves 29 and' 30 respectively, which, when seated, normally close the exhaust ports 25 and 26,but which when elevated permit the oil to readily pass through said ports into an oil. chamber 31 formed in the cap portion 10 above the plugsQa-Qa.

A cylindrical wire screen 32 is secured to the body part 8, xbeing conveniently fitted to the reduced base portion thereof and secured thereto as by means of a removable retaining ring 34 of any desired construction as clearly indicated iat 34. The screen is conveniently formed with a screen bottom 35 adapted to prevent dirt and the like from finding its way into the pump parts. The oil discharge chamber 31 has an outlet communie-ating with an oil distributing p-ipe or conduit 36 conveniently projecting laterally and thence upwardly for connection in any suitable mamier with the parts ot the engine to be lubricated. any suitable distrilmting mechanism in operative association with the conduit 36, not vnecessary to illustrate or describe, being employed in this connection. The construction and operation may be reviewed as follows:

lVliile the device is described as particularly useful in the feedingl of oil1 it is to be borne in mind that it is within the contemplation of the invention to utilize the same in connection with the feed' of water, gasoline or the like.v in which connections the saine will be found quite serviceable, and satisfactory in use. The pump being practiclally all assembled before installation, the same may be installed on any ot the approved ltypes ot' engine, particularly the vertical type, without `any material changes in the construction of the lat-ter. Since the vertically disposed tubular extension 13 is.y in the preferred embodii'nent oi the invention, formed integral with the cover part or cap 10. this dispenses with any intermediate lil) connecting means thereby making the parts rounding wall of the bearing 13 in the relative rotatable movement of the shaft.

Should it become necessary to .cleanse the strainer, it is but necessary to remove the detachable retaining ring ,34 whereupon ready accessto the interior of the strainer or screen or access to the ports 19 and 20 and associated parts may be obtained.

By reason `of the adjustable connection between the oscillator 6 and rotatable shaft fl, the impeller or oil displacement member 15 may be properly centered with respect to the block or partition 17 positioned in the segmental cutout part of the impeller 15.

The pump is a double acting one, and needs no packing, stuffing boxes, glands, or piston rings to contend with.

In operation .the pump is mounted, through the medium of the bracket. support 14, upon the frame-work of the engine, whereby to position the lower ,or screen'end thereof Vwithin the oil chamber constituting the means .of supply, and so soon as the engine is started, the engine shaft 1 imparts continuous rotatable movement to the connected disc 2 when the oscillator 6 through the medium of its connection formed by the projecting pin or lug,r 7 with a cam groove 3, will have imparted thereto, and will in turn impart to the .shaft 4, a back and forth or oscillating-movement. As the impelleror oil displacement ydisc rotates or oscillates back and forth, it squeezes or forces the oil out of the intervening space between the impeller and stationary block 17, the oil finding exit in each movement of the impeller disc 15 into one or the other of the oil outlets 25-26 from whence it flows through the oil chamber 31 and is elevated through the discharge conduit 3G, The oil discharge is of course continuous because of the provision for a discharge as the impeller disc 15 moves either forward orbackward. Likewisev` in each forward and backward movement of the impeller disc 15, oil is 4drawn into the chamber formed by the cutout part of the disc 16 and stationary block 17 upon one side or the other of sai-d block through the valve controlled ports 19-20. As the impeller disc is moved in one direction, the oil to one side of the stationary block is forced out of the exhaust port 25, the ball valve 29 being at this time elevated, whereas the inlet valve Q3 is maintained seated. (ln the other hand as the impeller is moved in an `opposite direction. the oil on the opposite side of the stationary block 17 is forced out of the exhaust port Q61 the valve 30 at this time being elevated, whereas the inlet valve 2l is seated.

It has been ascertained in practice that the pump operates to continuously feed the oil in an efficient manner, whether the engine be speeded up or slowed down to say below ten revolutions per minute, and in this particular has many advantages over 1, In a pump of the character described,

the combination of a stationary body part,

comprising substantially fiat end walls and a cylindrical side wall, a shaft projecting through one of the endI walls, an impeller member within the chamber formedk by the body part, said impeller member being solid and mounted on said shaft so as to substantially fill the space between the flat end walls and curved ,to conform to the curvature of the cylindrical wall, the body part having inlet and exhaust ports in the flat end walls thereof, said impeller member having a segmental cut-out part projecting inwardly from the periphery thereof, a stationary partition mounted on the body part and Within the space formed by said cut-out part of the impeller member, and mechanical means for continuously imparting oscillating movement to the shaft about its longitudinal axis wherebyy to oscillate the impeller member. l

2. In a pump of the -character described, the combination of a vertically disposed stationary body part having a cylindrical oil chamber, a solid disk-shaped horizontally disposed impeller in the chamber, said impeller being of a -t'hiclrnes to closely lit the top and bottom walls of the chamber, means for oscillating` the impeller about a vertical axis, and means whereby the yoil is continuously drawn into and discharged from the body part in the oscillating movement of the impeller. l

3. In a punipof the character described, the combination of a. vertically disposed cylindrical stationary casing forming a chamber` thc bottom and top walls of which are provided with inlets and outlets, a vertically disposed shaft projecting through oner cud of the casing'. a segmental partition positioned within the casing and proj ccting from the wall of the casing to the shaft` a hori- Zout-ally ldisposed solid impeller disk xed on the shaft and having a segmental cut-out part of a width in excess of that of the segmental partition, aud means operatively associated with the shaft for imparting oscillating movement to the impeller disk.

1l. In a` pump of the character described, the `combination of a vertically disposed stationary cylindrical body part having substantially flat top and bottom walls with inllO iis

let and exhaust ports therein, a horizontally disposed solid, impeller disk positioned in the body part and closely fitting the walls of thc same and having a segmental cut-,out part projecting from its periphery inwardly` a shaft adapted to move-*about vertical axis, projecting through the body part and connected to said impeller disk, partition in the body part in the space formed by the cut-out part of the impeller disk and slightly spaced at its sides therefrom, means for oscillating the shaft, and movable means operatively connected directly with said shaft for automatically ,imparting continuous oscillating movement thereto.

5. In a pump of the character described, the combination of a vertically disposed'stationary cylindrical body part, having closed top and bottom walls, an oscillating impeller segment in the body part closely fitting the same to prevent movement of the oil around the impeller leavingan oil space-located between the ends of the impeller, a partition in the body part lin said space, means for imparting continuous oscillating movement to the impeller abouta vertical axis, the bottom wall of the body part having inlets to said space, one at each side of said partition; and the top wall having exhaust ports in communication with said space, one at each side of the partition, the top wall also having,` in communication therewith a discharge conduit to deliver the discharged oil to the parts to be lubricated.

6. In a pump of the character described,

' the combination of a vertically disposed stationary cylindrical body part, having closed top and bottom walls, an oscillating horizontally disposed impeller segment in the body part closely fitting the same to prevent passage of the Voil around the impeller leaving an oil space located between the ends of the impeller, a partition in the body part in said space, power-driven means for impartingv continuous oscillating movement to the impeller about a vertical axis, the bottom wall of thc body part having inlets to said space, one at each side of said partition; and the top wall having exhaust ports in communication with said space, one at each side of the partition, the top wall also having' in communication therewith a discharge conduit to deliver the discharged oil to the parts to be lubricated, automatically operable values for each of said ports, and the top wall of the body part being removable to permit access to the interior of the body part and parts therein.

7. ln a pump of the character described, the combination of a vertically disposed stationary c vlii'idrical body part, having' closed top and bottom walls7 an oscillatinghorizontally disposed impeller segment in the body part closely fitting the same to prevent passage of the oil around the impeller leaving an oil space located between the ends ot the impeller, a partition in the body part in said space, power-driven means for continuously imparting oscillating movement to the impeller about a vertical axis, the bottom wall of the body vpart having inlets to said space, one at each side of the partition,

the top wall also having in communication therewith a discharge conduit. to deliver the and a screen underlying the body part whereby to protect the inlet ports.

8. ln a pump of the character described, the combination of a vertically disposed eylindrical stationary casing forming acharnber, the'bottom and top walls of which are provided with valve-controlled inlets and outlets, a vertically-disposed shaft project-- ing` through the top wall of the casing, a segmental partition positioned within the casing and curved to conform to the wall of the casing' and the periphery of the shaft, a horizontally disposed solid impeller disc fixed on the shaft and having a segmental cut-out part of a width in excess of that of the segmental partition, and means operatively associated with the shaft forv imparting oscillating movement tothe impeller disc, which said disc is of a thickness to substantially lill the space in the casing between* the top and bottom walls thereof;

9. In a pump of the character described, the combination of a rotatable cam member` mounted on a horizontal axis and having a peripheral camy groove, a vertically disposed shaft having;v connected directly thereto a cam groove engaging member, whereby said shaft will receive continuous" oscillating movement under the action of the cam `groove, a stationary vertically disposed casing' having' closed top and bottom walls, the said shaft projecting' through the top wall of the casing, a horizontally disposed impeller disc secured to said shaft of a thickness to substantially fill the space between the top andbottom walls of the casing, the said disc having a segmental cut-out part in its periphery, a partition xed to the side wall of the casing of ar width less than the width of the segmental cut-out part of the disc, the bottom wall of the casing having inlet ports one at each side of said partition, and the top wall of the casing having exhaust ports, and all of said ports being,r 'va ive-controlled. l

lO. In a pump apparatus of the character described. the combination of Va vertically thickness to substantially fill the space bey tween the top and bottom walls of the easport therein, and valves in said outlet ports. ing, said disc having a segmental cut-out of In testimony whereof I hereunto aiix my a. width greater than that of the partition. signature in the presence of two witnesses. the bottom wall of the Casing having Valve- HOMER HULL. Controlled inlet ports, one at each side of the partition, removable plugs in the top wall of the partition, said plugs having an outlet Vitnesses:

J. R. STEIN, HARRY EBEL. 

